
package com.mt.log.aspect;

import com.mt.common.utils.RequestHolder;
import com.mt.common.utils.StringUtils;
import com.mt.common.utils.ThrowableUtil;
import com.mt.log.domain.Log;
import com.mt.log.service.LogService;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 *
 * @date 2018-11-24
 */
@Component
@Aspect
@Slf4j
public class LogAspect {

    private final LogService logService;

    ThreadLocal<Long> currentTime = new ThreadLocal<>();

    public LogAspect(LogService logService) {
        this.logService = logService;
    }

    private static ExecutorService service = Executors.newFixedThreadPool(10);

    /**
     * 配置切入点
     */
    @Pointcut("@annotation(com.mt.log.annotation.Log)")
    public void logPointcut() {
        // 该方法无方法体,主要为了让同类中其他方法使用此切入点
    }

    /**
     * 配置环绕通知,使用在方法logPointcut()上注册的切入点
     *
     * @param joinPoint join point for advice
     */
    @Around("logPointcut()")
    public Object logAround(ProceedingJoinPoint joinPoint) throws Throwable {
        Object result;
        currentTime.set(System.currentTimeMillis());
        result = joinPoint.proceed();
        Log log = new Log("INFO", System.currentTimeMillis() - currentTime.get());
        currentTime.remove();
        HttpServletRequest request = RequestHolder.getHttpServletRequest();
        asyncSaveLog(request, joinPoint, log);
        return result;
    }

    /**
     * 配置异常通知
     *
     * @param joinPoint join point for advice
     * @param e         exception
     */
    @AfterThrowing(pointcut = "logPointcut()", throwing = "e")
    public void logAfterThrowing(JoinPoint joinPoint, Throwable e) {
        Log log = new Log("ERROR", System.currentTimeMillis() - currentTime.get());
        currentTime.remove();
        log.setExceptionDetail(ThrowableUtil.getStackTrace(e).getBytes());
        HttpServletRequest request = RequestHolder.getHttpServletRequest();
        asyncSaveLog(request, (ProceedingJoinPoint) joinPoint, log);
    }

    private void asyncSaveLog(HttpServletRequest request, ProceedingJoinPoint point, Log log) {
        service.execute(() -> {
            logService.save("app", StringUtils.getBrowser(request), StringUtils.getIp(request), point, log);
        });
    }

}
